200923194 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種引擎，其中將由曲軸之曲軸臂所飛揚 之油用於潤滑傳動器。 【先前技術】 經建構成使得將油喷塗於曲轴箱中之傳動器上的習知引 擎在（例帽利文獻！中發現有所揭示。專利文獻ι中所揭 2之引擎女裝於摩托車上且包含曲轴箱（其可旋轉地支撐 曲軸）及前傾汽缸（其自曲轴箱大致朝向車輛本體之前 出）。 傳動器提供於曲軸箱内之曲知夕/么* 軸之後部以與曲軸在車輛本 ^:向方向上對準。傳動器包括包含主軸及驅動軸之兩 ==心，且經建構成使得提供於主軸上之複數個齒 :i、於驅動軸上之複數個齒輪的一部分在軸向方向上 :二且藉由改變用於動力傳動之齒輪來達成速度改變。 -輪在軸向方向上之移動的換檔又定位於盘輪下方。 ::知引擎中，用於供油之導管橫向地提供於曲轴箱* 二^方的區域中。導管之-端經由曲軸箱側壁中之油 ,Λ 至形成於主軸之中心部分中的油路，且另一端姐 曲軸箱側壁中之油路而連接至形成於驅動軸之 中的油路。亦„ 丨刀 亦ρ，穿過驅動軸中之油路的油供應至導管。 ^形成有經打開至其外部周邊表面之複數個喷油口。 供應至導管· $、、士 Μ 卜一 /由的一部分自喷油口噴射出導管外部，且自 、塗於傳動器之複數個齒輪上。油噴塗於齒輪上，藉 131795.doc 200923194 以潤滑齒輪之响合部分。又’自齒輪滴下之油黏附至換伊 叉以潤滑待潤滑之換檔又之一部分。 [專利文獻 1] JP-B-6-27494 【發明内容】 [本發明待解決之問題] 需要進一步降低包括用於摩托車之引擎的引擎之成本且 進一步小型化曲軸箱。 然而，上文所描述之習知引擎不能滿足此需要。此係因200923194 IX. Description of the Invention: TECHNICAL FIELD The present invention relates to an engine in which oil flying by a crank arm of a crankshaft is used to lubricate an actuator. [Prior Art] A conventional engine constructed such that the oil is sprayed on the actuator in the crankcase is disclosed in the article [Examples of the literature]. The engine of the patent disclosed in Patent Document 1 is on the motorcycle. The vehicle includes a crankcase (which rotatably supports the crankshaft) and a forward tilting cylinder (which exits from the crankcase generally toward the vehicle body). The actuator is provided in the rear of the crankshaft in the crankcase to The crankshaft is aligned in the direction of the vehicle. The actuator includes two == cores including the main shaft and the drive shaft, and is constructed such that a plurality of teeth are provided on the main shaft: i. a plurality of gears on the drive shaft Part of the axial direction: Second, the speed change is achieved by changing the gear for the power transmission. - The shift of the wheel in the axial direction is again positioned below the wheel. The oil supply conduit is laterally provided in the region of the crankcase*. The end of the conduit is passed through the oil in the side wall of the crankcase to the oil passage formed in the central portion of the main shaft, and the other end of the crankcase The oil path in the side wall is connected to The oil path in the moving shaft. Also, the boring tool is also supplied to the conduit through the oil passage in the drive shaft. ^There are a plurality of fuel injection ports that are opened to the outer peripheral surface thereof. A part of $,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In addition, the oil that has been dripped from the gear is adhered to the fork to lubricate one of the shifts to be lubricated. [Patent Document 1] JP-B-6-27494 [Disclosure] [Problems to be solved by the present invention] The cost of the engine including the engine for the motorcycle is further reduced and the crankcase is further miniaturized. However, the conventional engine described above cannot satisfy this need.
為上文所描述之引擎獨佔式地使用喷塗油之導管。亦即， 此係因為在引擎之情況下，曲軸箱在對應於導管延伸穿過 之空間的尺寸方面變大，且零件在對應於導管之數目方面 很多以導致製造成本增加。 為了消除此問題，已構思出本發明，且本發明具有其用 以提供引擎之目標，在引擎中 隹5丨竽中，有可能在不使用諸如導管 等等之獨佔式零件的情況下 令it町rr况下將油間早地喷塗於傳動器上。 [解決問題之手段] #為了達到目標，本發明提供一種引擎，其包含：曲軸 相，其可旋轉地支撐曲轴 其自曲軸箱大致朝 向車輛本體之前方突出 向車 *傳動為軸心’其相對於曲軸而朝 亡車輛本體之後方被提 蚣，Α担似 伏付十订於曲軸；及傳動齒 輪’、鮝供於傳動器軸心上，且其巾ώ 橫向壁，且其甲曲軸箱形成有··第- 八 其疋位於曲軸臂下方附近且汾荖曲鉍辟 邊表面而彎曲m 附近且者曲軸臂之外部周 以覆蓋傳動齒輪之上部部八.傳動回輪上方附近 刀，及散油空間，其經形成為在 131795.doc 200923194 曲軸臂之外部周邊表面 壁，第二橫向壁形成有向下突出之= 壁延伸至第二橫向 轴臂自第-橫向壁朝向傳動器移動：方：分’且曲軸在曲 請求項2中所描述的根據本發明擎上凝轉° 擎添加構造，其中第—橫向壁經形擎向如=们之引 之内部分隔為朝向曲軸臂 ‘'、、隔板、、將曲轴箱 請求-中所描述的根據本者。 擎添加構造，其中第二橫向壁相對如^求項1之引 於曲軸箱之内側，且空間界定於第二横壁而定位 請求項4中所描述的根據本發 ^、夕壁之間。 擎添加構造，其中引擎向如請求項3之引 室。 間構成用於將油與漏氣分離之通氣腔 清求項5中所描述的根據 擎添加構造，其中在傳動器軸心之軸？：如睛求们^ 出部分相對於傳動器& D向上觀看時，突 位，且傳動St軸心之軸線而朝向車輛本體之後方定 '方移動二::齒輪之最頂部部—之 ::=;r …_成二= 域上“近_分定位於—卡合在-起之區 擎:::：，所:述的根據本發明之引擎向如請求項1之引 k -巾傳動齒輪及與傳動齒輪嗤合之另_傳動 I3i795.doc 200923194 齒輪經提供以在車柄本體之縱向方向上對準，兩個齒輪在 兩個齒輪之上部齒相互接近之方向上旋轉，第二橫向壁經 形成為自兩個齒輪之喷合部分上方附近而在車辆本體之縱 向方向上延伸，且突出部分定位於卡合部分上方附近。 請求項8中所描述的根據本發明之引擎向如請求項7之引 I:加構造，其中第二橫向壁之朝向車輛本體之後方的端 連接至曲軸箱之在車㈣度方向上㈣的 ( 外壁係以用以自上方及後方包圍另-傳動上： 邛分的形狀而形成。 [本發明之效果] 夷：：本：明’在引擎操作中潤滑諸如曲軸、連接桿、活 :之待潤滑之部分的油沿著曲軸箱之壁行進，因為兑 :向下流動之液體’或油變得有薄霧以滴於曲軸箱中：； :-部分向下流動至第一橫向壁或落於; 留於第一橫向壁上。 上以停 ::橫向壁上之油在其液體位準升高至與曲軸臂之下， 士致相同的位準時與旋轉曲軸臂進行接觸。由於 旋轉，所以與曲軸臂進行接觸的在第一 ，離心力而在散油空間中向後向上飛揚。另—；：之 在變得有薄霧且在ώ^ 方面’ 曲轴臂進行接觸之、以2漂浮之油中的在滴落過程中與 向下流動，從而黏=力而在曲軸f周圍飛揚以 如上文所描述之橫向壁及曲軸箱之内壁’或與 間中向後向上飛揚。壁上方飛揚的油一起在散油空 131795.doc -12- 200923194 飛揚至散油* pq + 且剩餘、、由在種二B之油之—部分直接黏附至傳動齒輪， 以黏附至第二與曲轴臂之間穿過以碰撞第二橫向壁 收集於突出部二：自！Γ第二橫向壁之油藉由重力而 、 且自犬出部分滴落。 之突出部分滴落之油碰撞定位於突出部分下方 因此==齒以潤滑齒及與齒响合之另-齒輪之齒。 橫向壁上之、由：發明’排出至曲軸箱内以向下流動至第-、土上之油因曲轴箱夕·» r 且導致油自第黏附至第二橫向壁， …约 突出部分滴落至傳動齒輪上，夢 此使能夠潤滑傳動齒輪。 輪上藉 因此，與諸如與料箱分離地形成 以將油喷塗於值叙哭^ s的賀油零件用 、 σ上之習知引擎相比，有可f ip Μ ϋ 明藉由對應於由冑了 ι根據本發 且有可能達#Γ 的程度來達成小型化， 因此1成 零件數目之減少的製造成本降低。 因此，有可能根據本發明提供一種 * 輪之磨損（儘管尺寸較小且價廉）。 限制傳動齒 根據請求項2之本發明，第一 之油流向曲軸f。@此發卩—存於油盤中 地〜占 根據本發明，曲軸臂不會不必要 地授動油，且因為曲軸臂攪動油，…要 耗。 有可旎減少動力損 根據請求項3之本發明，第二橫向臂 間所界定的空間大致充當用於絕熱之空間：:之外壁之 在引擎操作的同時將第二橫向壁及黏附至第—^:於可 度下，所以防止黏附至第二橫向壁之油被過 131795.doc -13- 200923194 度地冷卻以在黏度方面變得 忖不必要地高。 因此，根據本發明，黏附 昂一知向壁之油黏附至篦-橫向壁且此後立即朝向突出 一 , 卜一 出0p分向下流動，使得油不會在 黏附至弟一橫向壁之狀態下 5 凝固，且使大致全部量之黏附 至第一杈向#之油能夠滴落於齒輪上。 因此，有可能根據本發明提 種引擎’其中，進一步 限制傳動齒輪之磨損。 根據請求項4之本發明，筮 第―杈向壁用以形成通氣腔室 之壁’使得與此等壁經分別 成之情況相比，有可能達成 曲軸箱之小型化。 根據請求項5之本發明，自笛_ 自第一检向壁之突出部分滴落 的油黏附至傳動齒輪之相對於盆 、/、取頂。[5部分而朝向車辆之 後部的側。此時，油所點糾$ ^ ^ μ 寸至之彼等齒歸因於傳動齒輪之 旋轉而向下移動，使得使自突 丁從曰犬出邛为滴洛之油在碰撞齒時 難以飛賤。因此，有可能根據本發明確實地具有油，其已 自第二橫向壁之突出部分滴落’從而黏附至傳動齒輪之 齒’使得有可能提供一種引聲， 裡5丨竽其中進一步限制傳動齒輪 之磨損。 根據請求項6之本發明，自第二橫向壁之突出部分滴落 的油黏附至換檔又與傳動齒輪之凹槽相互卡合的區域，且 黏附至傳動齒輪與傳動器軸心經栓槽輕合之栓槽搞合區 域’以潤滑滑動區域。因此’有可能根據本發明提供—種 引擎其中可限制卡合區域及栓槽耦合區域令之磨損。 根據請求項7之本發明，自第二橫向壁之突出部分滴落 131795.doc • 14- 200923194 的油由兩個傳動齒鲶诸 1 吁勒W輪之嚙合部分叹住以潤滑齒與齒相互 觸之區域。 因此’根據本發明’兩個傳動齒輪之嚙合部分可直接由 油濁滑，使得有可能提供-種引擎，其中進一步限制兩個 齒輪之磨損。 、根據請求項8之本發明’另一傳動齒輪以高速旋轉藉 、已广附至傳動齿輪之油之—部分藉由離心力而飛揚以黏 附至第一杈向壁及曲軸箱之外壁。黏附至壁之油自其中滴 落以碰撞另一傳動齒輪，且由齒輪在旋轉方向上進二步向 後飛揚，其以高速旋轉。因此，油在另一傳動齒輪與兩個 壁之間在旋轉方向上向後移動’且再次被引入至嚙合部 分。 因此’根據本發明’由於可再次將已自第二橫向壁之突 出部分滴落以潤滑傳動齒輪及另-傳動齒輪的油用以充分 ί 地潤滑兩個齒輪，所以有可能提供一種引擎，其中兩個齒 輪進一步難以磨損。 【實施方式】 以下將參看圖！至圖5來詳細地描述根據本發明之引擎之 實施例。 圖1為展示根據本發明之引擎的縱向截面圖。圖！描繪移 除在車輛本體之左側上曲軸箱之半部的狀態。在圖二 圖”之斷裂位置由線m_ni指示，且圖4中之斷裂位置由 線™指示。圖2為以放大比例尺來展示旧之一部分的 截面圖，且圖3為展示根據本發明之引擎之基本部分的橫 131795.doc -15- 200923194 向截面圖在圖3中，圖1中之斷裂位置由線I-Ι指示。圖4 為展π形成有第一橫向壁之區域的截面圖。圖5為展示自 車輛本體之中心觀看在車輕本體之右側上曲轴箱之半部之 狀態的透視圖，且圖6為展示自車輕本體之中心觀看在車 輛本體之左側上曲㈣之半部之狀態的透視圖。 在此等圖式中，參考數字1表示根據實施例之引擎。引 • ^為氣冷型四㈣單汽虹引擎且安裝於摩托車（未圖示）之 車輛框架上。藉由固定螺釘而將提供於引擎k曲轴箱2上 f: #三個安裝托架3至5固定至車輛框架之引擎安裝座來將引 擎1安裝於車輛框架上。 如圖1所示引擎1包括：曲轴箱2，其可旋轉地支撐曲 軸6;汽缸本體8,活塞7裝配且插入至汽缸本體8内；及汽 缸頭部9,其安裝至汽缸本體8之尖端（前端汽缸本體8安 裝至曲軸箱2之前端，其中汽缸之軸線c在車輛本體之前方 向上導引且稍微傾斜。汽缸本體8及汽缸頭部9構成本發明 中所提及之前傾汽缸1 〇。 汽缸頭部9形成有進氣口 11及排氣口 12，且具備進氣閥 13、排氣閥U及閥操作裝置15，閥操作裝置15驅動進氣閥 13及排氣閥14。閥操作裝置15經建構成使得曲軸6之旋轉 經傳動至的凸輪軸16之旋轉由搖臂17傳動至進氣閥13及排 氣閥14。 進氣導管1 8連接至汽缸頭部9之上部部分，且排氣導管 1 9連接至其下部部分。 如圖3所示，曲軸箱2包含在車輛本體之左側上的半部 131795.doc •16- 200923194 (在下文被稱作左側曲軸箱半部）2丨及在車輛本體之右側上 的半部（在下文被稱作右側曲軸箱半部）22。如圖3所示，曲 軸箱2藉由軸承23、24而可旋轉地支撐曲軸6，且在其中容 納傳動器25。 如圖3所示，飛輪磁電機蓋26安裝至左側曲軸箱半部以 之外部。㈣3所示’離合器蓋27安裝至右側曲軸箱半部 22之外部。 如圖3所示，曲軸6包含由軸承23可旋轉地支撐於左側曲 軸箱半部21上之左側軸部分以、由軸承以可旋轉地支撐於 右側曲轴相半部22上之右側軸部分6b、分別朝向車輛本體 之内。卩整體地开》成於軸部分6a、6b之端處的一對碟形曲軸 煮6c、6d，及用於曲軸臂6c、6d之連接的曲軸銷心。 提供於曲轴6之左側軸部分6a上的為定時鏈輪以、起動 馬達齒輪29、飛輪磁電機3〇之轉子3〇a ’等等。定時鏈輪 28經由定時鏈31而連接至閥操作裝置15之從動鏈輪（未圖 示）。 油泵驅動齒輪32及離心式離合器33提供於曲軸6之右側 軸部分6b上。離心式離合器33包括與曲軸6整體地旋轉之 離合器底板（clutch shoe) 33a及離合器外套（clutch 〇uter) 33b，離合器底板33a藉由離心力而導致與離合器外套33b 接觸。離合器外套33b可旋轉地支撐於曲軸6上，且經齒輪 辆合至稍後描述之傳動離合器34之離合器外殼34a。 如圖1所示’曲軸6之曲軸銷心經由軸承36(見圖丨）而可旋 轉地支撐連接桿35之大端35a。 131795.doc -17- 200923194A conduit for spraying oil is used exclusively for the engine described above. That is, this is because, in the case of the engine, the crankcase becomes large in size corresponding to the space through which the duct extends, and the parts are many in terms of the number corresponding to the ducts to cause an increase in manufacturing cost. In order to eliminate this problem, the present invention has been conceived, and the present invention has its object of providing an engine, and in the engine, it is possible to use the exclusive parts such as pipes and the like. The oil is sprayed on the actuator early in the rr condition. [Means for Solving the Problem] # In order to attain the object, the present invention provides an engine comprising: a crankshaft phase rotatably supporting a crankshaft which protrudes from the crankcase substantially toward the front of the vehicle body toward the vehicle* as an axis' After the crankshaft and the vehicle body is lifted, it is lifted, and the load is fixed on the crankshaft; and the transmission gear ', 鮝 is supplied to the shaft of the transmission, and the transverse wall of the casing is formed, and the crankcase is formed. There is ······························································································· The oil space is formed as an outer peripheral surface wall of the crankshaft arm at 131795.doc 200923194, the second transverse wall is formed with a downwardly protruding = the wall extends to the second transverse axial arm from the first-lateral wall toward the actuator: square The sub-" and the crankshaft are described in the claim 2, according to the present invention, wherein the first transverse wall is divided into the interior of the crankshaft arm, Separate ,, crankcase request - by the present described. The load-increasing configuration, wherein the second transverse wall is directed to the inner side of the crankcase relative to the first item, and the space is defined by the second transverse wall and is positioned between the wall according to the present invention as described in claim 4. The engine adds a construct in which the engine is directed to the chamber as in claim 3. Between the venting chambers for separating the oil from the blow-by gas, the ash-added configuration described in item 5, where the shaft of the actuator is centered? : If the eye part is relative to the actuator & D, when looking up, the position of the arm, and the axis of the St axis, and the direction of the vehicle body, the side of the vehicle is moved to the side of the vehicle: the top part of the gear: :=;r ... _ _ = = = = = = = = = = = = = = = = = ========================================================================== The transmission gear and the transmission gear are combined with the transmission gear. I3i795.doc 200923194 The gear is provided to be aligned in the longitudinal direction of the handle body, and the two gears rotate in the direction in which the upper teeth of the two gears approach each other, second The transverse wall is formed to extend in the longitudinal direction of the vehicle body from the vicinity of the spray portion of the two gears, and the protruding portion is positioned near the upper portion of the engaging portion. The engine according to the present invention described in claim 8 In the first aspect of the present invention, the first lateral wall faces the rear side of the vehicle body and is connected to the crankcase in the direction of the vehicle (four degrees) (the outer wall is used to surround the other from the top and the rear). On the transmission: formed by the shape of the split. [Effect of the present invention] :: Ben: Ming 'Lubricates the oil such as the crankshaft, connecting rod, and live parts of the engine to be lubricated along the wall of the crankcase during engine operation because the liquid that flows down or the oil becomes misty Drip into the crankcase: :: - part flows down to the first transverse wall or falls on; remains on the first transverse wall. Stops on: The oil on the lateral wall rises at its liquid level to Under the crank arm, the same level is in contact with the rotating crank arm. Due to the rotation, the contact with the crank arm is first, centrifugal force is flying backwards in the bulk oil space. It is misty and in the aspect of ώ^, the crankshaft arm is in contact with the 2 floating oil in the dripping process and flows downward, so that the force is forced to fly around the crankshaft f to the lateral direction as described above. The wall and the inner wall of the crankcase 'or fly upwards and backwards from the middle. The oil flying above the wall is flying together in the loose oil 131795.doc -12- 200923194 to the loose oil * pq + and the remaining, by the oil of the second B Partially adhered directly to the drive gear to adhere to the second The shaft arms pass between to collide with the second lateral wall to collect on the protrusion 2: the oil from the second transverse wall is dripped by gravity and from the dog part. The protruding part of the oil colliding is located at Below the protruding part, the == tooth is used to lubricate the tooth and the tooth of the other gear that is combined with the tooth. The transverse wall is: the invention 'discharges into the crankcase to flow down to the first, the oil on the soil due to the crankshaft Box »·»r and causes the oil to adhere to the second transverse wall from the first, ... about the protruding portion dripping onto the transmission gear, which makes it possible to lubricate the transmission gear. Therefore, the wheel is formed separately from the container, for example. Compared with the conventional engine on the σ, the oil is sprayed on the value of the crying ^ s, compared to the conventional engine on σ, which can be f ip Μ ϋ 藉 对应 对应 对应 对应 对应 对应 对应 ι ι ι ι ι ι ι 根据 根据 根据 根据 根据 根据 根据In order to achieve miniaturization, the manufacturing cost of the reduction in the number of parts is reduced. Therefore, it is possible to provide a wear of the wheel (although the size is small and inexpensive) according to the present invention. Limiting the transmission tooth According to the invention of claim 2, the first oil flows to the crankshaft f. @本发卩—Stored in the oil pan 地〜占 According to the present invention, the crank arm does not unnecessarily impart oil, and because the crank arm agitates the oil, ... consumes. There is a reduction in power loss. According to the invention of claim 3, the space defined between the second lateral arms substantially serves as a space for thermal insulation: the outer wall is attached to the first transverse wall and adhered to the first while the engine is operating. ^: Under the condition, the oil which is prevented from adhering to the second lateral wall is cooled by 131795.doc -13 - 200923194 to become unnecessarily high in viscosity. Therefore, according to the present invention, the oil adhering to the wall is adhered to the crucible-transverse wall and immediately thereafter protrudes toward the first one, and a downward flow of 0p is performed so that the oil does not adhere to the transverse wall of the younger brother. 5 Solidification, and the oil that adheres approximately the entire amount to the first direction can drip onto the gear. Therefore, it is possible to illuminate the engine in which the wear of the transmission gear is further restricted according to the present invention. According to the invention of claim 4, the 杈 first-direction wall is used to form the wall of the venting chamber, so that it is possible to achieve miniaturization of the crankcase as compared with the case where the walls are separately formed. According to the invention of claim 5, the oil dripping from the flute _ from the protruding portion of the first detecting wall adheres to the top of the transmission gear with respect to the basin, /. [5 parts towards the side of the rear of the vehicle. At this time, the oil is corrected by $ ^ ^ μ inch until the other teeth are moved downward due to the rotation of the transmission gear, so that the self-sudden squid is discharged from the scorpion dog into the oil of the stagnation. cheap. Therefore, it is possible to have oil according to the present invention which has been dripped from the protruding portion of the second lateral wall to adhere to the teeth of the transmission gear, making it possible to provide a sounding which further restricts the transmission gear. Wear and tear. According to the invention of claim 6, the oil dripping from the protruding portion of the second lateral wall adheres to the region where the shifting and the groove of the transmission gear are engaged with each other, and is adhered to the transmission gear and the shaft of the transmission through the bolt groove The bolt groove fits the area to lubricate the sliding area. Thus, it is possible to provide an engine in accordance with the present invention in which the engagement area and the bolted coupling area are limited to wear. According to the invention of claim 7, the oil dripping from the protruding portion of the second lateral wall 131795.doc • 14-200923194 is sighed by the meshing portions of the two drive teeth 1 to the W wheel to lubricate the teeth and the teeth Touch the area. Therefore, the engaging portion of the two transmission gears according to the present invention can be directly slid by the oil, making it possible to provide an engine in which the wear of the two gears is further restricted. According to the invention of claim 8, the other transmission gear is rotated at a high speed, and the oil which has been widely attached to the transmission gear is partially flying by centrifugal force to adhere to the first slanting wall and the outer wall of the crankcase. The oil adhering to the wall drops from it to collide with the other transmission gear, and the gear is swung backward in two steps in the rotational direction, which rotates at a high speed. Therefore, the oil moves rearward in the rotational direction between the other transmission gear and the two walls' and is again introduced to the engaging portion. Therefore, according to the present invention, it is possible to provide an engine since the oil which has been dripped from the protruding portion of the second lateral wall to lubricate the transmission gear and the other transmission gear can be used to sufficiently lubricate the two gears. The two gears are further difficult to wear. [Embodiment] The following will refer to the figure! An embodiment of the engine according to the present invention is described in detail with reference to FIG. 1 is a longitudinal cross-sectional view showing an engine in accordance with the present invention. Figure! The state in which the half of the crankcase is removed on the left side of the vehicle body is depicted. The fracture position in Fig. 2 is indicated by the line m_ni, and the fracture position in Fig. 4 is indicated by the line TM. Fig. 2 is a cross-sectional view showing an old part on an enlarged scale, and Fig. 3 is a view showing the engine according to the present invention. The cross section of the basic portion is 131795.doc -15- 200923194. The cross-sectional view is shown in Fig. 3. The fracture position in Fig. 1 is indicated by line I-Ι. Fig. 4 is a cross-sectional view showing a region where the first lateral wall is formed by π. 5 is a perspective view showing a state in which a half of the crankcase is viewed from the center of the vehicle body on the right side of the vehicle light body, and FIG. 6 is a half (4) half of the left side of the vehicle body viewed from the center of the vehicle light body. A perspective view of the state of the portion. In the drawings, reference numeral 1 denotes an engine according to an embodiment. The guide frame is an air-cooled four (four) single steam engine and is mounted on a motorcycle (not shown) vehicle frame. The engine mount 1 is attached to the vehicle frame by fixing the screws on the engine crankcase 2 by f: # three mounting brackets 3 to 5 to the engine frame of the vehicle frame. The engine 1 includes a crankcase 2 that rotatably supports a song 6; a cylinder body 8, the piston 7 is fitted and inserted into the cylinder body 8; and a cylinder head 9 mounted to the tip end of the cylinder body 8 (the front end cylinder body 8 is mounted to the front end of the crankcase 2, wherein the axis c of the cylinder is The vehicle body is guided in the front direction and slightly inclined. The cylinder body 8 and the cylinder head 9 constitute a front tilt cylinder 1 本 mentioned in the present invention. The cylinder head 9 is formed with an air inlet 11 and an exhaust port 12, and is provided with The intake valve 13, the exhaust valve U, and the valve operating device 15, the valve operating device 15 drives the intake valve 13 and the exhaust valve 14. The valve operating device 15 is constructed such that the camshaft 16 to which the rotation of the crankshaft 6 is transmitted is The rotation is transmitted by the rocker arm 17 to the intake valve 13 and the exhaust valve 14. The intake duct 18 is connected to the upper portion of the cylinder head 9, and the exhaust duct 19 is connected to the lower portion thereof. As shown in Fig. 3, The crankcase 2 includes a half 131795.doc • 16-200923194 (hereinafter referred to as a left crankcase half) 2 丨 on the left side of the vehicle body and a half on the right side of the vehicle body (hereinafter referred to as Right crankcase half) 22. As shown in Figure 3, crankcase 2 is supported by bearing 23 24, rotatably supporting the crankshaft 6, and accommodating the actuator 25 therein. As shown in Fig. 3, the flywheel magneto motor cover 26 is mounted to the outside of the left crankcase half. (4) 3 shows the 'clutch cover 27 mounted to the right side The outside of the crankcase half 22. As shown in Fig. 3, the crankshaft 6 includes a left shaft portion rotatably supported by a bearing 23 on the left crankcase half 21, and is rotatably supported by a bearing to the right crankshaft half. The right shaft portion 6b on the portion 22 is respectively directed toward the inside of the vehicle body. The cymbal is integrally opened to form a pair of disc-shaped crankshaft cooks 6c, 6d at the ends of the shaft portions 6a, 6b, and for the crank arms 6c, 6d. The connected crankshaft pin. Provided on the left shaft portion 6a of the crankshaft 6 is a timing sprocket, a starter motor gear 29, a rotor of the flywheel magneto motor 3〇a', and the like. The timing sprocket 28 is coupled to a driven sprocket (not shown) of the valve operating device 15 via a timing chain 31. The oil pump drive gear 32 and the centrifugal clutch 33 are provided on the right shaft portion 6b of the crankshaft 6. The centrifugal clutch 33 includes a clutch shoe 33a and a clutch casing 33b that rotate integrally with the crankshaft 6, and the clutch bottom plate 33a comes into contact with the clutch casing 33b by centrifugal force. The clutch housing 33b is rotatably supported on the crankshaft 6 and is geared to the clutch housing 34a of the transmission clutch 34 described later. As shown in Fig. 1, the crank pin of the crankshaft 6 rotatably supports the large end 35a of the connecting rod 35 via a bearing 36 (see Fig. 。). 131795.doc -17- 200923194
曲軸6在圖1中逆時針地旋轉。亦即，曲轴6在曲軸臂 6c、6d自梯後描述之第一橫向壁73朝向傳動 向上旋轉。 U 如圖丄及圖3所示，傳動器25包含定位於曲㈣之後部的 主軸41、定位於主軸41之後部向上的驅動轴42、提供於主 軸41上之四個齒輪43至 、、 捉仏於驅動軸42上之四個齒輪 47至50、用於兩個換槽叉η、52夕孩勒ιΑΛι4ρ仏 β ^ 5 1 W之移動的操作力傳動裝置 (未圖示），等等。The crankshaft 6 rotates counterclockwise in FIG. That is, the crankshaft 6 is rotated upward toward the transmission at the first lateral wall 73 described by the crank arms 6c, 6d from behind the ladder. U As shown in FIG. 3 and FIG. 3, the actuator 25 includes a main shaft 41 positioned at a rear portion of the curved portion (four), a drive shaft 42 positioned at a rear portion of the main shaft 41, and four gears 43 provided on the main shaft 41 to catch The four gears 47 to 50 on the drive shaft 42 and the operating force transmission device (not shown) for the movement of the two shifting forks η, 52, and the like, and the like.
主軸41構成本發明中所提及之傳動器軸心，提供於主轴 41上之四個齒輪43至46構成本發明中所提及之傳動齒輪， 且提供於驅動軸42上之四個齒輪47至5〇構成本發明中所提 及之另-傳動齒輪。主軸41在圖！中順時針地旋轉，且 動軸42在圖1中逆時針地旋轉。因此，主轴“上之齒輪μ 至46及驅動軸42上之齒輪47至5〇在相互嚙合齒輪之上部齒 相互接近之方向上旋轉。 奸如圖3所示，主軸41由齒輪53、54可旋轉地支撐於曲軸 相上主軸4 H形成為延伸穿過右側曲軸箱半部2 2以在 車輛本體之右側上突出。傳動離合器34提供於主轴41之在 車輛本體之右側上的端上。傳動離合器34包括經齒輪輕合 至離心式離合器33之離合器外殼34a、定位於離合器外殼 34a内部之離合器軸套34b、提供於離合器外殼34&與離合 器軸套34b之間的複數個摩擦板34c、使摩擦板34c在軸向 方向上偏壓之盤簧34d、推動盤簧34d之中心部分之推桿 34e，等等。推桿34e由操作力傳動裝置（未圖示）剛好在速 131795.doc •18- 200923194 度改變之前向車輛本體之右側移動。推桿34e與盤簧34d之 彈力相抵而向車輛本體之右側移動，藉以傳動離合器34自 連接狀態變檔至斷開狀態。 離合器外殼34a可旋轉地支撐於主軸41上。離合器軸套 34b在可於軸向方向上移動之狀態下經栓槽耦合至主軸41 且支撐於主軸41上’且經抑制以免相對於主軸41而旋轉。 因此，在將傳動離合器3 4置於連接狀態下之情況下，將離 心式離合器3 3 (曲軸6)之旋轉傳動至主軸4 1，且在將傳動離The main shaft 41 constitutes the actuator shaft mentioned in the present invention, and the four gears 43 to 46 provided on the main shaft 41 constitute the transmission gear mentioned in the present invention, and the four gears 47 provided on the drive shaft 42 are provided. Up to 5 〇 constitutes another transmission gear mentioned in the present invention. The spindle 41 is in the picture! The clock rotates clockwise, and the moving shaft 42 rotates counterclockwise in Fig. 1. Therefore, the main shaft "upper gears μ to 46 and the gears 47 to 5 on the drive shaft 42 rotate in directions in which the teeth of the intermeshing gears approach each other. As shown in Fig. 3, the main shaft 41 is provided by the gears 53, 54 Rotatingly supported on the crankshaft phase, the main shaft 4H is formed to extend through the right crankcase half 2 2 to protrude on the right side of the vehicle body. The transmission clutch 34 is provided on the end of the main shaft 41 on the right side of the vehicle body. The clutch 34 includes a clutch housing 34a that is lightly coupled to the centrifugal clutch 33 via a gear, a clutch bushing 34b positioned inside the clutch housing 34a, and a plurality of friction plates 34c provided between the clutch housing 34& and the clutch sleeve 34b. The friction plate 34c is biased in the axial direction by a coil spring 34d, a push rod 34e that pushes a central portion of the coil spring 34d, and the like. The push rod 34e is operated by a force transmission device (not shown) at a speed of 131795.doc. 18- 200923194 Before moving to the right side of the vehicle body, the push rod 34e is moved against the elastic force of the coil spring 34d to move to the right side of the vehicle body, whereby the transmission clutch 34 is shifted from the connected state to the disconnected state. The clutch housing 34a is rotatably supported on the main shaft 41. The clutch sleeve 34b is coupled to the main shaft 41 via a pin groove and supported on the main shaft 41 in a state of being movable in the axial direction and is restrained from being opposed to the main shaft 41. Therefore, in the case where the transmission clutch 34 is placed in the connected state, the rotation of the centrifugal clutch 3 3 (crankshaft 6) is transmitted to the main shaft 4 1, and the transmission is driven away.
合器3 4置於斷開狀態下之情況下，切斷旋轉至主軸4丨之傳 動0 經由形成於主軸41之中心部分中的通孔41a而插入推桿 34e。自形成於左側曲軸箱2與飛輪磁電機蓋26之間的油路 55而將油供應至通孔413内。油自提供於主軸41上以徑向 地延伸之複數個油孔41b流出至主軸41之外部周邊，以潤 滑可旋轉地支撐於外部周邊上之支撐部分’諸如，齒輪 44、46、離合器外殼34a，等等。 如圖1及圖2所示，驅動軸42相對於主軸41而自車輛本體 向後且斜向上地定位，且由軸承56、57(如圖3所示）可旋轉 地支撐於曲軸箱2上。驅動軸42經形成為延伸穿過左側曲 軸箱半部21以在車輛本體之左側上突出。後輪驅動鍵㈣ 安裝至驅動軸42之在車輛本體之左側上的端。後輪_鍵 輪58經由鏈（未圖示）而連接至後輪。 油自提供於右側 油自形成於驅動 油路59提供於驅動軸42之申心部分中 曲軸箱半部22中之油路60供應至油路59 131795.doc •19- 200923194 軸42上以徑向地延伸之油孔61流出至驅動軸“之外部周 邊，以潤滑可旋轉地支撐於外部周邊上之齒輪叼、49之支 撐部分。 在提供於主軸41上之四個齒輪43至46中的在圖3中定位 於車輛本體上之最右側之齒輪43整體地形成於主軸41上。 在四個齒輪43至46中的自右側定位於第二個之齒輪44及定 位於最左側之齒輪46在經抑制以免在軸向方向上移動之狀 悲下可方疋轉地支撐於主軸41上。在四個齒輪43至46中的自 f ; 右側定位於第三個之齒輪45在可在軸向方向上移動且經抑 制以免相對於主軸41而旋轉之狀態下經栓槽輕合至主轴4ι 且支撐於主軸41上，且形成有環形凹槽45a，換檔叉51與 環形凹槽45a卡合。 爪形離合器62提供於自右側定位於第三個之齒輪45及定 位於齒輪45之兩側上之兩個齒輪44、46上。 提供於驅動軸42上之四個齒輪47至50及提供於主轴41上 之四個齒輪43至46經提供以在車輛本體之縱向方向上對 I 準。在提供於驅動軸42上之四個齒輪47至50中的在圖3中 定位於最左側之齒輪50固定至驅動轴42，以便與其_起旋 轉，且與主軸41上之齒輪46嚙合。 在驅動軸42上之四個齒輪47至50中的定位於最右側之齒 輪47及自右側定位於第三個之齒輪49在經抑制以免在轴向 方向上移動之狀態下可旋轉地支撐於驅動軸42上。定位於 最右側之齒輪47與主軸41上之齒輪43嚙合，且自右側定位 於第三個之齒輪49與主軸41上之齒輪45嚙合。在提供於驅 131795.doc -20- 200923194 動軸42上之四個齒輪47至50中的自右側定位於第二個之齒 輪4 8在可在軸向方向上移動之狀態下經拴槽耦合至驅動軸 42且支撐於驅動軸42上，且經抑制以免相對於驅動軸“而 旋轉，且形成有環形凹槽48a，換檔又52與環形凹槽48a卡 合。爪形離合器63提供於自右側定位於第二個之齒輪料及 定位於齒輪48之兩側上之兩個齒輪47、49上。 如圖1所示，換檔叉51、52可旋轉地支樓於交又地提供 於曲軸箱2中之導桿64上。換檔又51、52由配置於導桿64 下方附近之憂檔鼓（未圖示）之凸輪在車輛寬度方向上移 動，以便與變檔操作聯鎖。經由操作力傳動裝置（未圖示） 而將變檔鼓連接至變檔踏板，變檔踏板由佔據者之腳操 縱。 如圖1及圖3至圖6所示，與曲軸箱2之左側曲軸箱半部2 i 及右側曲軸箱半部2 2整體地形成的為垂直且縱向延伸之縱 向壁71、在車輛寬度方向上自縱向壁71之垂直縱向尖端中 心地延伸之外壁72(見圖5及圖6)、定位於曲軸臂6c、6d下 方附近且沿著曲軸臂6c、6(1之外部周邊表面而彎曲之第一 杈向壁73、定位於主軸41上之四個齒輪43至46上方附近以 覆盍齒輪之上部部分之第二橫向壁74，等等。 左側曲軸箱半部21與右側曲軸箱半部22由夹持螺釘（未 圖不）在外壁72、72、第一橫向壁73、73及第二橫向壁 74、74經使得相互進行接觸之狀態下相互結合。在圖1 ' 圖2、圖5及圖6中，左側曲軸箱半部21與右側曲軸箱半部 22之配合表面由參考數字75表示。 131795.doc •21 - 200923194 又，左側曲軸箱半部21、右側曲軸箱半部22及離合器蓋 27之下部端經形成以便界定油盤％(見圖丨）。 在如圖4所示之兩個縱向壁7卜71中，、油栗π安裝至右 側曲軸箱半部22之縱向壁71。油泉77採用自油盤％:吸取 之油經排出至形成於第一橫向壁73中之主廊道78中的構 造。主廊道78藉由相互配合形成於左側曲軸箱半⑽之第 -橫向壁73中的凹陷凹槽73a與形成於右側曲軸箱半部η 之第-橫向壁73中的凹陷凹槽73b而形成。如圖i所示，凹 陷凹槽73a、73b經形成為在縱向方向上延伸，以便在第一 才買向壁73之全部區域上延伸。 主廊道78之在車輛前側上的端經由形成於右側曲轴箱半 部22中之油路81(見圖1}而連接至渡油器（未圖示流出渡 油器之油供應至曲軸6中之油路82(見圖3)及凸輪_中之 油路83(見圖1)。When the clutch 34 is placed in the off state, the rotation of the spindle 4 is turned off. The pusher 34e is inserted through the through hole 41a formed in the central portion of the spindle 41. Oil is supplied into the through hole 413 from the oil passage 55 formed between the left crankcase 2 and the flywheel magnetonet cover 26. The oil flows out from the plurality of oil holes 41b provided on the main shaft 41 to extend radially to the outer periphery of the main shaft 41 to lubricate the support portions rotatably supported on the outer periphery such as the gears 44, 46 and the clutch housing 34a. ,and many more. As shown in Figs. 1 and 2, the drive shaft 42 is positioned rearwardly and obliquely from the vehicle body with respect to the main shaft 41, and is rotatably supported by the crankcase 2 by bearings 56, 57 (shown in Fig. 3). The drive shaft 42 is formed to extend through the left crankcase half 21 to protrude on the left side of the vehicle body. The rear wheel drive key (4) is mounted to the end of the drive shaft 42 on the left side of the vehicle body. The rear wheel _ key wheel 58 is coupled to the rear wheel via a chain (not shown). The oil is supplied from the right side oil to the oil passage 60 formed in the crankcase half 22 of the center portion of the drive shaft 42 formed in the drive oil passage 59 to the oil passage 59 131795.doc • 19- 200923194 The oil hole 61 extending toward the ground flows out to the outer periphery of the drive shaft to lubricate the support portion of the gear 叼, 49 rotatably supported on the outer periphery. Among the four gears 43 to 46 provided on the main shaft 41 The rightmost gear 43 positioned on the vehicle body in Fig. 3 is integrally formed on the main shaft 41. Among the four gears 43 to 46, the second gear 44 and the leftmost gear 46 are positioned from the right side. It is rotatably supported on the main shaft 41 under the circumstance of being suppressed from moving in the axial direction. From the four gears 43 to 46 from the f; the right side is positioned on the third gear 45 on the Moving in the direction and being suppressed from being rotated relative to the main shaft 41, the pin groove is lightly coupled to the main shaft 41 and supported on the main shaft 41, and an annular groove 45a is formed, and the shift fork 51 and the annular groove 45a are stuck. The dog clutch 62 is provided to be positioned at the third from the right side. The wheel 45 is positioned on two gears 44, 46 on either side of the gear 45. The four gears 47 to 50 provided on the drive shaft 42 and the four gears 43 to 46 provided on the main shaft 41 are provided to The longitudinal direction of the vehicle body is aligned with respect to I. The gear 50 positioned at the leftmost side in FIG. 3 among the four gears 47 to 50 provided on the drive shaft 42 is fixed to the drive shaft 42 so as to rotate therewith, and Engaged with the gear 46 on the main shaft 41. The gear 47 positioned at the rightmost side among the four gears 47 to 50 on the drive shaft 42 and the third gear 49 positioned from the right side are suppressed from being axially aligned The moving shaft is rotatably supported on the drive shaft 42. The gear 47 positioned at the rightmost side meshes with the gear 43 on the main shaft 41, and is engaged with the gear 45 of the main shaft 41 from the third gear 49 positioned on the right side. The gears 48 from the right side of the four gears 47 to 50 provided on the drive shaft 131795.doc -20-200923194 on the moving shaft 42 are coupled to the second gear 48 in a state in which they are movable in the axial direction. To the drive shaft 42 and supported on the drive shaft 42 and suppressed to avoid relative to the drive Axis "is rotated, and is formed with an annular groove 48a, the shift with the annular groove 48a and 52 engage. The dog clutch 63 is provided on the right side of the second gear member and the two gears 47, 49 positioned on either side of the gear 48. As shown in Fig. 1, the shifting forks 51, 52 are rotatably provided on the guides 64 in the crankcase 2 in a rotatable manner. The shifting gears 51, 52 are moved in the vehicle width direction by cams of a worry drum (not shown) disposed near the lower side of the guide rod 64 to be interlocked with the shifting operation. The shift drum is coupled to the shift pedal via an operating force transmission (not shown) that is manipulated by the occupant's foot. As shown in FIGS. 1 and 3 to 6, a vertical and longitudinally extending longitudinal wall 71 integrally formed with the left crankcase half 2 i and the right crankcase half 2 2 of the crankcase 2 is formed in the vehicle width direction. The outer wall 72 (see FIGS. 5 and 6) extends from the vertical longitudinal end of the longitudinal wall 71, is positioned near the lower side of the crank arms 6c, 6d and is curved along the outer peripheral surface of the crank arms 6c, 6 (1) The first slanting wall 73, the vicinity of the four gears 43 to 46 positioned on the main shaft 41 to cover the second lateral wall 74 of the upper portion of the gear, etc. The left crankcase half 21 and the right crankcase half 22 is joined to each other by a clamping screw (not shown) in a state where the outer walls 72, 72, the first lateral walls 73, 73 and the second lateral walls 74, 74 are brought into contact with each other. Figure 1 'Figure 2 5 and 6, the mating surfaces of the left crankcase half 21 and the right crankcase half 22 are indicated by reference numeral 75. 131795.doc • 21 - 200923194 Again, the left crankcase half 21, the right crankcase half 22 And the lower end of the clutch cover 27 is formed to define the oil pan % (see Fig. 。). In the two longitudinal walls 7 and 71, the oil pump π is mounted to the longitudinal wall 71 of the right crankcase half 22. The oil spring 77 is made from the oil pan %: the sucked oil is discharged to the first transverse wall 73. The structure in the main corridor 78. The main corridor 78 is formed by the recessed groove 73a formed in the first-transverse wall 73 of the left crankcase half (10) and the first-lateral direction formed in the right crankcase half η A recessed groove 73b is formed in the wall 73. As shown in Fig. i, the recessed recesses 73a, 73b are formed to extend in the longitudinal direction so as to extend over the entire area of the first purchase wall 73. Main corridor The end on the front side of the vehicle is connected to the oil trap via an oil passage 81 (see Fig. 1) formed in the right crankcase half 22 (the oil flowing out of the oil tank to the crankshaft 6 is not shown) Road 82 (see Figure 3) and oil path 83 in cam_ (see Figure 1).
供應至曲軸6中之油路82的油潤滑離合器外套別及轴承 36之支撐部分，其支撐連接桿之大端。另一方面，供應至 凸輪軸16之油路83的油潤滑凸輪軸“及搖臂17之滑動部 分。又，供應至凸輪轴16之油之一部分自提供於右側曲轴 箱半部22與汽紅本體8連接在一起（如圖3所示）之區域附近 ,喷油孔84噴射至汽缸孔85内。所噴射之油潤滑活塞7、 汽缸壁表面、活塞銷7a(見圖丨），等等。 油廊道78之在車輛後側上的端連接至形成於左側曲軸箱 半部21上之油路55及形成於右側曲軸箱2上之油路的。 如圖5及圖6所示，形成於左側曲軸箱半部2ι之縱向壁” 131795.doc -22- 200923194 及右側曲軸箱半部22之縱向壁71上的為用於曲軸6之軸承 23、24經裝配至的圓孔86、用於主轴41之軸承53、5^經裝 配至的圓孔87、用於驅動軸42之軸承56、57經裝配至的圓 孔88、用於變檔鼓之軸承經裝配至的圓孔89。 第一橫向壁73突出地提供於縱向壁71上以在車輛寬度方 向上中心地導引。第一橫向壁73形成於曲軸臂6c、Μ下方 附近以在車輛本體之縱向方向上延伸且充當隔板，其將曲 拍箱2之内部分隔為朝向曲軸臂6c、6d之一者及朝向油盤 76之一者。 如圖1及圖2所示，第二橫向壁74形成於外壁72之上部端 處以在縱向方向上自車輛本體之中心部分向下延伸。具體 言之，如圖2所示，第二橫向壁74包含沿著曲軸臂6c、6d 之外部周邊表面向後向下延伸之向前傾斜壁91、自向前傾 斜壁91之下部端傾斜地且向後向下延伸之底壁92，及自底 壁9 2之下部知（後端）向後向上且傾斜地延伸之向後傾斜壁 93 ° 在曲軸箱2中，底壁92經形成為在主軸41上方且自主軸 之在車輛本體之左側上的端至其在車輛本體之右側上的端 延伸。又，底壁92經形成為在引擎！安裝於車輛框架上之 狀態下向後向下傾斜。 向前傾斜壁93經形成為沿著齒輪47且在齒輪47附近延 伸，在驅動轴42上之四個齒輪47至50當中，齒輪47具有最 大外徑。向後傾斜壁93之後端（亦即，第二橫向壁74之在 車輛後側上的端）連接至在曲軸箱2之上部端處大致水平地 131795.doc -23- 200923194 延伸之外壁72。 向後傾斜壁93及大致水平外壁72經形成為自上方及後部 包圍提供於驅動軸42上之四個齒輪47至5〇之上部部分的形 狀。亦即H向壁74經形成以便在車輛本體之縱向方 向上自主軸4丨上之四個齒輪43至46與驅動軸“上之四個齒 輪47至50相互嚙合的區域上方附近延伸。 向下突出之突出部分94形成於底部92及向後傾斜壁93之 邊界區域上。 大出邛勺94經形成為具有向後且傾斜地向下導引之三角 形截面（如圖2所示），且形成於第二橫向壁74之底壁％上以 在車輛寬度方向上在其整個區域上延伸（如圖5及圖6所 示）。又，如圖2所示，在主軸41之軸向方向上觀看時，形 成有大出部分94之位置在縱向方向上自主軸4丨之軸線向後 朝向車輛本體之後方定位。 犬出部分94以此方式形成於第二橫向壁74上，藉以突出 邛刀94疋位於主軸41上之四個嵩輪43至46與驅動轴42上之 四個齒輪47至50相互嚙合的區域上方附近，如圖2所示。 另外，突出部分94定位於齒輪45之環形凹槽45a與換檔又 51相互卡合之區域上方附近。 根據實施例之第二橫向壁74經形成為在形狀方面為向下 凸起的，如上文所描述。因此，根據實施例，第二橫向壁 74相對於外壁72而定位於曲軸箱2内部，使得在第二橫向 壁74與外壁72之間界定空間S。 根據實施例，空間S用作用於將油與漏氣分離之通氣腔 131795.doc -24- 200923194 至95。通氣腔室95之内部經由漏氣入口（未圖示）而連通至 曲軸箱2之内部且由安裝至曲軸箱2之外壁72的通氣軟管％ 連接至空氣清潔器（未圖示）。複數個隔板97提供於通氣腔 至95中’使得在漏氣入口與通氣軟管96之間形成具有曲徑 結構之通路。The oil-lubricated clutch housing supplied to the oil passage 82 in the crankshaft 6 and the support portion of the bearing 36 support the large end of the connecting rod. On the other hand, the oil supplied to the oil passage 83 of the cam shaft 16 lubricates the cam shaft "and the sliding portion of the rocker arm 17. Further, one portion of the oil supplied to the cam shaft 16 is supplied from the right crankcase half 22 and the steam red Near the area where the bodies 8 are connected together (as shown in Fig. 3), the fuel injection holes 84 are injected into the cylinder holes 85. The injected oil lubricates the piston 7, the cylinder wall surface, the piston pin 7a (see Fig. 丨), etc. The end of the oil gallery 78 on the rear side of the vehicle is connected to the oil passage 55 formed on the left crankcase half 21 and the oil passage formed on the right crankcase 2. As shown in FIGS. 5 and 6, Formed on the longitudinal wall of the left crankcase half 2 ” 131795.doc -22- 200923194 and the longitudinal wall 71 of the right crankcase half 22 are round holes 86 to which the bearings 23, 24 for the crankshaft 6 are assembled, A circular hole 87 to which the bearings 53, 5 for the main shaft 41 are fitted, a circular hole 88 to which the bearings 56, 57 for driving the shaft 42 are fitted, and a circular hole 89 to which the bearing for the shift drum is fitted . The first lateral wall 73 is projectingly provided on the longitudinal wall 71 to be guided centrally in the vehicle width direction. The first lateral wall 73 is formed near the crank arm 6c, below the crucible to extend in the longitudinal direction of the vehicle body and serves as a partition that divides the interior of the crankcase 2 toward one of the crank arms 6c, 6d and toward the oil One of the disks 76. As shown in Figs. 1 and 2, a second lateral wall 74 is formed at the upper end of the outer wall 72 to extend downward from the central portion of the vehicle body in the longitudinal direction. Specifically, as shown in FIG. 2, the second lateral wall 74 includes a forward inclined wall 91 extending rearward and downward along the outer peripheral surface of the crank arms 6c, 6d, and obliquely and rearward from the lower end of the forward inclined wall 91. a downwardly extending bottom wall 92, and a rearwardly inclined wall 93° extending rearwardly and obliquely from the lower portion of the bottom wall 92 (in the rear end). In the crankcase 2, the bottom wall 92 is formed above the main shaft 41 and is autonomous. The end of the shaft on the left side of the vehicle body extends to its end on the right side of the vehicle body. Also, the bottom wall 92 is formed to be in the engine! It is tilted back and down in a state of being mounted on the vehicle frame. The forward inclined wall 93 is formed to extend along the gear 47 and near the gear 47. Among the four gears 47 to 50 on the drive shaft 42, the gear 47 has the largest outer diameter. The rear end of the rearward inclined wall 93 (i.e., the end of the second lateral wall 74 on the rear side of the vehicle) is connected to the outer wall 72 extending substantially horizontally at the upper end of the crankcase 2 by 131795.doc -23-200923194. The rearward inclined wall 93 and the substantially horizontal outer wall 72 are formed in a shape that surrounds the upper portions of the four gears 47 to 5 provided on the drive shaft 42 from the upper and the rear. That is, the H-direction wall 74 is formed so as to extend in the longitudinal direction of the vehicle body in the vicinity of the region where the four gears 43 to 46 on the autonomous shaft 4 are engaged with the four shafts 47 to 50 on the drive shaft. A protruding portion 94 is formed on a boundary region between the bottom portion 92 and the rearward inclined wall 93. The large spoon 94 is formed to have a triangular cross section that is guided rearward and obliquely downward (as shown in FIG. 2), and is formed in the first The bottom wall of the two lateral walls 74 extends over the entire area of the vehicle width direction as shown in FIGS. 5 and 6. Further, as shown in FIG. 2, when viewed in the axial direction of the main shaft 41 The position where the large portion 94 is formed is positioned in the longitudinal direction with the axis of the autonomous axis 4丨 rearward toward the rear of the vehicle body. The dog exit portion 94 is formed on the second lateral wall 74 in this manner, whereby the protruding file 94 is located The vicinity of the region where the four idlers 43 to 46 on the main shaft 41 and the four gears 47 to 50 on the drive shaft 42 are in mesh with each other is as shown in Fig. 2. In addition, the projecting portion 94 is positioned at the annular groove 45a of the gear 45. On the area where the shifting 51 is engaged with each other The second lateral wall 74 according to the embodiment is formed to be downwardly convex in shape, as described above. Thus, according to an embodiment, the second lateral wall 74 is positioned relative to the outer wall 72 to the crankcase 2 Internally, a space S is defined between the second transverse wall 74 and the outer wall 72. According to an embodiment, the space S serves as a venting chamber 131795.doc-24-200923194 to 95 for separating the oil from the blow-by gas. The venting chamber 95 The inside is communicated to the inside of the crankcase 2 via a leak inlet (not shown) and is connected to an air cleaner (not shown) by a vent hose % attached to the outer wall 72 of the crankcase 2. A plurality of partitions 97 Provided in the venting chamber to 95' causes a passage having a labyrinth structure to be formed between the leak inlet and the vent hose 96.
在根據實施例之引擎i中，在曲軸臂6c、6d之外部周邊 表面附近垂直地延伸之散油空間98形成於第二橫向壁74與 第一橫向壁73之間，如圖i至圖3所示。具體言之，散油空 間98經形成為自曲軸臂6c、6d之間的第一橫向壁及主軸 41上之四個齒輪43至46朝向第二橫向壁”向後向上延伸， 如圖2所示。亦即，第二橫向壁74之向前傾斜壁μ及底壁 92界定散油空間98之頂壁。 在以此方式所建構之引擎〗的情況下，主要自曲軸6中之 一路2供應至連接桿大端軸承36之油及自喷油孔84供應至 汽缸孔85内之油濁滑待潤滑之部分，且接著經排出至運轉 中之曲軸箱2内。油沿著曲軸箱2之縱向壁71及其他區域向 下流動’ ®為其為液體且變得有薄霧以滴於曲軸箱2中。 油之=部分向下流動至第—橫向壁73或^於第—橫向壁73 上以停留於第一橫向壁73上。 第杈向壁7 3上之油在其液體位準升高至與曲軸臂6 c、 之下部端大致相同的位準時與旋轉曲軸臂6e、6d進行接 觸。由於曲軸臂6c、6d以古 $ ㈣…疋轉，所以與曲軸臂6c、6d 間98中ΓΓ第一橫向壁73上之油藉由離心力而在散油空 間8中向後向上飛揚。另-方面，在變得有薄霧且在曲轴 13J795.doc -25- 200923194 粕2中漂浮之油中的在滴落過程中與曲軸臂6c、6d進行接 觸之油亦藉由離心力而在曲軸臂6c、6d周圍飛揚以向下流 動，從而黏附至第一橫向壁73及曲軸箱2之縱向壁71，或 與如上文所描述之自第一橫向壁73上方飛揚的油一起在散 油空間98中向後向上飛揚。 飛揚至散油空間98内之油之一部分直接黏附至主軸4 i上 之齒輪43至46，且剩餘油穿過齒輪43至46與曲軸臂6c、6d 之間的間隙以碰撞第二橫向壁74之向前傾斜壁9丨及底壁％ 以黏附至壁91、92。亦即，由曲軸臂6c、6d在寬範圍内飛 揚且自齒輪43至46向後向上散開之油可由第二橫向壁以收 納0 以此方式黏附至第二橫向壁74之油沿著底壁92之下部表 面行進以歸因於重力而向下流動，且收集於突出部分料上 以自突出部分94滴落。以此方式，自突出部分94滴落之油 碰撞定位於突出部分94下方的主軸41之齒輪43至46之齒以 潤滑齒及驅動軸42之齒輪47至50之與前者齒嚙合的齒。 因此，根據實施例，排出至曲軸箱2以向下流動至第一 検向壁73上之油因曲軸臂6c、6d之旋轉而導致黏附至第二 才頁向壁74，且導致油自第二橫向壁74之突出部分94滴落於 傳動器25之齒輪43至46上，藉此使能夠潤滑主軸41之齒輪 43至46及驅動軸42之齒輪47至50。 因此，與諸如與曲軸箱2分離地形成之導管的喷油零件 用以將油噴塗於傳動器25上之習知引擎丨相比，有可能根 據實施例藉由對應於由零件所佔據之空間的程度來達成小 131795.doc -26- 200923194 3L化且除此之外，有可能達^ ^ ^ ^ ^ ^ ^ ^ 製造成本降低。在^ +件數目之减少的 斜的情況下，與汽虹賢直之構造相比傾 之油(已潤滑活塞7、汽缸劈…. 至缸孔85内 羞表面及活塞銷7a之油）難 曲軸6上，且因此難以向後飛揚β 然而，實施例用以使第一橫向 ^ 土 73此夠收集已潤滑活塞 广’之_部分以朝向傳動器25飛揚該部分油，使得 雖然汽缸向前傾斜，作有In the engine i according to the embodiment, the oil-sparing space 98 extending vertically near the outer peripheral surface of the crank arms 6c, 6d is formed between the second lateral wall 74 and the first lateral wall 73, as shown in FIGS. Shown. Specifically, the oil space 98 is formed to extend rearwardly upward from the first transverse wall between the crank arms 6c, 6d and the four gears 43 to 46 on the main shaft 41 toward the second lateral wall, as shown in FIG. That is, the forward inclined wall μ and the bottom wall 92 of the second lateral wall 74 define the top wall of the oil-sparing space 98. In the case of the engine constructed in this manner, it is mainly supplied from one of the crankshafts 6 The oil supplied to the large end bearing 36 of the connecting rod and the portion of the oil supplied from the fuel injection hole 84 into the cylinder bore 85 are slicked to be lubricated, and then discharged into the crankcase 2 in operation. The oil is along the crankcase 2. The longitudinal wall 71 and other regions flow downwardly as being liquid and become misty to drip into the crankcase 2. The oil = partially flows downward to the first - lateral wall 73 or the first - transverse wall 73 The upper portion stays on the first lateral wall 73. The oil on the third side wall 73 is carried out with the rotating crank arms 6e, 6d when the liquid level thereof rises to substantially the same level as the crank arm 6 c and the lower end. Contact. Since the crank arms 6c, 6d are turned by the ancient $(four)..., the first transverse wall 7 is interposed with the crank arms 6c, 6d. The oil on the 3 is propelled backwards in the oil-sparing space 8 by centrifugal force. On the other hand, in the dripping process in the oil which becomes misty and floats in the crankshaft 13J795.doc -25-200923194 粕2 The oil in contact with the crank arms 6c, 6d also flies around the crank arms 6c, 6d by centrifugal force to flow downward, thereby adhering to the first lateral wall 73 and the longitudinal wall 71 of the crankcase 2, or as above The oil as described above flying from above the first transverse wall 73 flies back in the bulk oil space 98. One portion of the oil that flies into the bulk oil space 98 is directly adhered to the gears 43 to 46 on the main shaft 4 i, and the remainder The oil passes through the gap between the gears 43 to 46 and the crank arms 6c, 6d to collide with the forward inclined wall 9 and the bottom wall % of the second lateral wall 74 to adhere to the walls 91, 92. That is, by the crank arm 6c The oil that flies in a wide range and spreads backwards and upwards from the gears 43 to 46 can be accommodated by the second lateral wall to receive 0. The oil adhered to the second lateral wall 74 in this manner travels along the lower surface of the bottom wall 92 to be attributed Flowing downward under gravity and collecting on the protruding part to self-protruding 94. In this manner, the oil dripping from the projecting portion 94 collides with the teeth of the gears 43 to 46 of the main shaft 41 positioned below the projecting portion 94 to lubricate the teeth and the gears 47 to 50 of the drive shaft 42 to mesh with the former teeth. Therefore, according to the embodiment, the oil discharged to the crankcase 2 to flow downward to the first slanting wall 73 causes adhesion to the second page to the wall 74 due to the rotation of the crank arms 6c, 6d, and causes Oil protrudes from the projections 94 of the second transverse wall 74 onto the gears 43 to 46 of the actuator 25, thereby enabling the gears 43 to 46 of the main shaft 41 and the gears 47 to 50 of the drive shaft 42 to be lubricated. Therefore, compared with the conventional engine raft for spraying oil on the actuator 25, such as the fuel injection part formed separately from the crankcase 2, it is possible to correspond to the space occupied by the parts according to the embodiment. The degree to reach the small 131795.doc -26- 200923194 3L and in addition, it is possible to reach ^ ^ ^ ^ ^ ^ ^ ^ manufacturing costs reduced. In the case of a decrease in the number of pieces, the oil of the inclined oil (the lubricated piston 7, the cylinder 劈.... to the oily surface of the cylinder bore 85 and the oil of the piston pin 7a) is difficult to crank the crankshaft. 6, and thus difficult to fly backwards. However, the embodiment is used to cause the first lateral soil 73 to collect the portion of the lubricated piston to fly the portion of the oil toward the actuator 25 such that although the cylinder is tilted forward, Have
仁有了靶將大ϊ油供應至傳動器乃之 齒輪43至50。 因此，有可能根據實施例製造能夠在小程度上限制傳動 器25之齒輪43至5G之磨損的引擎（儘管尺寸較小且價廉）。 根據實施例’第一橫向壁73在曲轴箱2上經形成為隔 板，其將曲軸箱2之内部分隔為朝向曲軸臂心、6d之一者 及朝向油盤76之一者。因此，在引擎【之情況下，第一橫 向壁73可抑制儲存於油盤76中之油以免流向曲軸臂6c :、 6d。因此’曲軸臂6c、咐會不必要地攪動油但因為曲 軸臂6c、6d攪動油，所以有可能減少動力損耗。 在根據實施例之引擎丨的情況下，在曲軸箱2之第二橫向 壁74與外壁72之間界定空間s。空間s大致充當用於絕熱之 空間°因此’在引擎操作時’防止第二橫向壁74直接曝露 至外部空乳使其不至於過度地冷卻。亦即，由於可將第二 検向壁74及黏附至第二橫向壁74之油維持於預定溫度，所 以防止黏附至第二橫向壁74之油被過度地冷卻而在黏度方 面變得不必要地高。 131795.doc -27- 200923194 因此，根據實施例，黏附至第二橫向壁74之油黏附至底 壁92且此後立即朝向突出部分94向下流動，使得油不會在 黏附至第二橫向壁74之狀態下凝固，且使大致全部量之黏 附至第二橫向壁74之油能夠滴落於齒輪43至46上。因此， 有可能根據實施例提供一種引擎，其中進一步限制傳動器 25之齒輪43至50的磨損。 根據實施例，使用曲軸箱2之第二橫向壁74與外壁72之 間的空間S來形成通氣腔室95，且第二橫向壁74用以界定 通氣腔室95之壁。因此，與第二橫向壁74與通氣腔室％之 壁經分離地形成的情況相比，可達成曲軸箱2之小型化。 根據實施例，自突出部分94滴落於第二橫向壁74上之油 黏附至主軸41之齒輪43至46之朝向車輛相對於其最頂部部 分之後部的側。此時，油所黏附至之彼等齒歸因於在圖i 中齒輪之順時針旋轉而向下移動，使得使自突出部分料滴 落之油在碰撞齒時難以飛減。 因此，根據實施例，有可能確實地具有油，其已自第二 橫向壁74之突出部分94滴^，從而黏附至主轴41之齒輪43 至46之齒。因此，有可能根據實施例確實地具有油，其已 自第二橫向壁74之突出部分94滴落，從而黏附至主軸…之 齒輪43至46之齒，使得有可能提供一種引擎，其中進一步 限制傳動器2 5之齒輪4 3至5 〇的磨損。 根據實施例，主軸41上之齒輪45經栓槽耦合至主軸“且 支稽於主轴41J^可在軸向方向上移動’且另外，齒輪45 形成有環形凹槽45a，換檔又51與環形凹槽45&卡合。如圖 131795.doc -28- 200923194 2所不，突出部分94定位於換槽又51與環形凹槽—相互卡 合之區域上方附近。 、匕根據實細例，自第二橫向壁74之突出部分叫滴落 的油黏附至換檔又5 1與主軸側齒輪45之環形凹槽45a相互 卡口的區域’且黏附至主軸側齒輪45與主軸4ι經检槽搞合 之栓槽輕合《，以潤滑滑動區域。因此，有可能根據實 施例提供-種引擎，其中限制卡合區域及栓槽麵合區域中 之磨損。 根據實施例’絲41之絲43至46及㈣軸42之齒輪Ο 至50(其與前者齒輪喻合）經提供以在車輛本體之縱向方向 上對準。在兩個相互喷合之齒輪巾，此㈣輪在兩個相互 嚙合齒輪之上部齒相互接近之方向上旋轉。又，第二橫向 壁74經形成以便自齒輪之嚙合部分上方附近而在車輛本體 之縱向方向上延伸，且突出部分94定位於嚙合部分上方附 近。因此，根據實施例，自第二橫向壁74之突出部分94滴 落的油由兩個相互嚙合齒輪之嚙合部分咬住以潤滑齒與齒 相互接觸之區域。 因此，有可能根據實施例提供一種引擎，其中由於可直 接潤滑兩個相互嚙合齒輪之嚙合部分，所以進一步限制齒 輪之磨損。 根據實施例，驅動軸42之齒輪47至50以高速旋轉，藉以 已黏附至齒輪之油之一部分藉由離心力而飛揚以黏附至第 二橫向壁74之向後傾斜壁93及定位於曲軸箱2之後上部區 域中的外壁72。黏附至壁之油自其中滴落以碰撞驅動軸42 131795.doc •29- 200923194 之齒輪47至50,且藉由齒輪47至5〇而在旋轉方向上向後飛 揚，其以高速旋轉。因此，油在驅動軸42之齒輪47至50與 兩個壁72、93之間在旋轉方向上向後（自車輛本體向前）移 動，且經再次引入至主軸41之齒輪43至46與驅動軸42之齒 輪47至50的嚙合部分。 因此，根據實施例，由於可再次將自第二橫向壁74之突 出部分94滴落以潤滑主軸41之齒輪43至46及驅動軸“之齒 輪4 7至5 0的油用以充分地潤滑兩個齒輪所以有可能提供 一種引擎，其中齒輪進一步難以磨損。 雖然實施例說明曲軸箱2之第二橫向壁74與外壁72之間 的空間s用以界定通氣腔室95之實例，但根據本發明之引 擎不限於此’而通氣腔室95可能不形成於空間8中。又， 與第二橫向壁74相對之外壁72可用以形成用於引擎之安裝 的托木及形成於托架中之凹座’以便可在空間s中進行昭 亮。 …、 又’在驅動軸42之轴向方向上觀看時沿著驅動軸42之齒 輪47至50面向曲軸箱2之内部的第三橫向壁1〇〇可形成於曲 =箱2之後端處所形成的外壁72上，如在圖2中由兩點鍵線 才丁以此方式來形成第三橫向壁100，藉以第三橫向壁 二〇可收納自齒輪43至50之喷合部分滴落的油，使得有可 曰力待再使用之油的量油藉由驅動軸U之齒輪ο至 的旋轉而饋入至嚙合部分。 【圖式簡單說明】 [圖1]圖1為展示根據本發明之引擎的縱向截面圖。 131795.doc -30- 200923194 部分的截面 [圖2]圖2為以放大比例尺來展示圖 圖。 [圖3 ]圖3為展示根據本發明之引擎之基本部分 面圖。 、和'向截 [圖4]圖4為展示曲軸箱中之形成有第一橫向 截面圖。 區域的 [圖5]圖5為展示自車輛本體之中心觀看在車輕本 側上曲軸箱之半部之狀態的透視圖。 體之右Ren has a target to supply large oil to the gears 43 to 50. Therefore, it is possible to manufacture an engine (although small in size and inexpensive) capable of limiting the wear of the gears 43 to 5G of the actuator 25 to a small extent according to the embodiment. According to an embodiment, the first transverse wall 73 is formed as a partition on the crankcase 2, which divides the interior of the crankcase 2 into one of the crank arm arms, 6d and one of the oil pans 76. Therefore, in the case of the engine, the first lateral wall 73 can suppress the oil stored in the oil pan 76 from flowing to the crank arms 6c:, 6d. Therefore, the crankshaft arms 6c and 咐 unnecessarily agitate the oil, but since the crank arms 6c, 6d agitate the oil, it is possible to reduce the power loss. In the case of the engine bore according to the embodiment, a space s is defined between the second lateral wall 74 of the crankcase 2 and the outer wall 72. The space s generally acts as a space for insulation. Therefore, the 'horizontal operation of the second lateral wall 74 prevents the second transverse wall 74 from being directly exposed to the outer hollow so that it does not excessively cool. That is, since the second weir wall 74 and the oil adhered to the second lateral wall 74 can be maintained at a predetermined temperature, the oil adhering to the second lateral wall 74 is prevented from being excessively cooled to become unnecessary in terms of viscosity. The ground is high. 131795.doc -27- 200923194 Thus, according to an embodiment, the oil adhered to the second lateral wall 74 adheres to the bottom wall 92 and thereafter flows downward toward the protruding portion 94 so that the oil does not adhere to the second lateral wall 74. The oil is solidified in a state in which substantially the entire amount of the oil adhered to the second lateral wall 74 can be dropped on the gears 43 to 46. Therefore, it is possible to provide an engine according to an embodiment in which the wear of the gears 43 to 50 of the actuator 25 is further restricted. According to an embodiment, the venting chamber 95 is formed using the space S between the second transverse wall 74 of the crankcase 2 and the outer wall 72, and the second transverse wall 74 is used to define the wall of the venting chamber 95. Therefore, the crankcase 2 can be miniaturized as compared with the case where the second lateral wall 74 and the wall of the ventilating chamber are formed separately. According to the embodiment, the oil dripping from the protruding portion 94 on the second lateral wall 74 is adhered to the side of the gears 43 to 46 of the main shaft 41 toward the rear of the vehicle with respect to the rearmost portion thereof. At this time, the teeth to which the oil adheres are moved downward due to the clockwise rotation of the gear in Fig. i, so that the oil dripping from the protruding portion is difficult to fly off when colliding with the teeth. Therefore, according to the embodiment, it is possible to surely have oil which has been dropped from the projecting portion 94 of the second lateral wall 74 to adhere to the teeth of the gears 43 to 46 of the main shaft 41. Therefore, it is possible to surely have oil according to the embodiment which has dripped from the protruding portion 94 of the second lateral wall 74, thereby adhering to the teeth of the gears 43 to 46 of the main shaft, making it possible to provide an engine in which further limitation The gear of the actuator 25 is worn by 4 to 5 〇. According to an embodiment, the gear 45 on the main shaft 41 is coupled to the main shaft via the pin groove "and the main shaft 41J can be moved in the axial direction" and additionally, the gear 45 is formed with an annular groove 45a, and the shift is 51 and the ring. The groove 45& is engaged. As shown in Fig. 131795.doc -28-200923194 2, the protruding portion 94 is positioned near the area where the groove is 51 and the annular groove is engaged with each other. The protruding portion of the second lateral wall 74 is called the dripping oil adhered to the region where the shifting gear 51 and the annular groove 45a of the main shaft side gear 45 are mutually engaged, and is adhered to the main shaft side gear 45 and the main shaft 4I through the inspection slot. The bolt groove is lightly coupled to lubricate the sliding area. Therefore, it is possible to provide an engine according to an embodiment in which the wear in the engaging area and the bolting area is limited. According to the embodiment, the wire 41 of the wire 41 is The gears 46 to 50 of the 46 and (4) shafts 42 (which are coupled to the former gears) are provided for alignment in the longitudinal direction of the vehicle body. In two mutually engaged gears, the (four) wheels are in two intermeshing gears. The upper teeth rotate in a direction close to each other. The wall 74 is formed to extend in the longitudinal direction of the vehicle body from above the meshing portion of the gear, and the protruding portion 94 is positioned near the upper portion of the engaging portion. Therefore, according to the embodiment, the protruding portion 94 from the second lateral wall 74 is dropped The falling oil is bitten by the meshing portions of the two intermeshing gears to lubricate the area where the teeth and the teeth contact each other. Therefore, it is possible to provide an engine according to an embodiment in which the meshing portions of the two intermeshing gears can be directly lubricated, Further limiting the wear of the gears. According to an embodiment, the gears 47 to 50 of the drive shaft 42 are rotated at a high speed, whereby a portion of the oil adhered to the gear is flying by centrifugal force to adhere to the rearward inclined wall 93 of the second lateral wall 74 and An outer wall 72 positioned in the upper region behind the crankcase 2. The oil adhering to the wall drops therefrom to collide with the gears 47 to 50 of the drive shaft 42 131795.doc • 29- 200923194, and is driven by gears 47 to 5 Flying backwards in the direction of rotation, which rotates at a high speed. Therefore, the oil is in the direction of rotation between the gears 47 to 50 of the drive shaft 42 and the two walls 72, 93. Afterwards (moving forward from the vehicle body), and again introduced into the meshing portions of the gears 43 to 46 of the main shaft 41 and the gears 47 to 50 of the drive shaft 42. Therefore, according to the embodiment, since the second transverse wall can be again The protruding portion 94 of 74 is dripped to lubricate the gears 43 to 46 of the main shaft 41 and the oil of the drive shaft "the gears 47 to 50 to sufficiently lubricate the two gears, so it is possible to provide an engine in which the gear is further hard to wear. Although the embodiment illustrates an example in which the space s between the second lateral wall 74 and the outer wall 72 of the crankcase 2 is used to define the venting chamber 95, the engine according to the present invention is not limited thereto and the venting chamber 95 may not be formed in In space 8. Further, the outer wall 72 opposite the second lateral wall 74 can be used to form a pallet for the mounting of the engine and a recess formed in the bracket so that it can be illuminated in the space s. ..., and 'the third transverse wall 1 面向 facing the inside of the crankcase 2 along the gears 47 to 50 of the drive shaft 42 when viewed in the axial direction of the drive shaft 42 may be formed at the rear end of the crank = box 2 On the outer wall 72, the third transverse wall 100 is formed in this manner by a two-point key line as shown in FIG. 2, whereby the third transverse wall 〇 can accommodate the oil dripping from the spray portion of the gears 43 to 50. The amount of oil having the oil to be reused is fed to the engaging portion by the rotation of the gear ο of the drive shaft U. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] Fig. 1 is a longitudinal sectional view showing an engine according to the present invention. 131795.doc -30- 200923194 Part of the section [Fig. 2] Fig. 2 is a diagram showing the scale on an enlarged scale. Fig. 3 is a front elevational view showing the engine according to the present invention. And FIG. 4 is a first transverse cross-sectional view showing the formation of the crankcase. [Fig. 5] Fig. 5 is a perspective view showing a state in which a half of the crankcase on the light side of the vehicle is viewed from the center of the vehicle body. Right
[圖6]圖6為展示自車輛本體之中心觀看在車輛 側上曲軸箱之半部之狀態的透視圖。 體之左 【主要元件符號說明】 1 引擎 2 曲軸箱 6 曲轴 6c ' 6d 曲軸臂 7 活塞 8 汽缸本體 9 汽虹頭部 21 左側曲軸箱半部 22 右側曲軸箱半部 25 傳動器 41 主軸 42 驅動轴 43 、 44 、 45 ' 齒輪 131795.doc 31 · 200923194 46 、 47 、 48 ' 49 ' 50 45a 51、52 71 72 73 74 94 95 98 環形凹槽 換樓叉 縱向壁 外壁 第一橫向壁 第二橫向壁 突出部分 通氣腔室 散油空間 i 131795.doc -32-Fig. 6 is a perspective view showing a state in which a half of a crankcase on a vehicle side is viewed from the center of a vehicle body. Left of the body [Description of main components] 1 Engine 2 Crankcase 6 Crankshaft 6c ' 6d Crankshaft 7 Piston 8 Cylinder body 9 Steam head 21 Left crankcase half 22 Right crankcase half 25 Actuator 41 Spindle 42 drive Shafts 43, 44, 45' Gears 131795.doc 31 · 200923194 46 , 47 , 48 ' 49 ' 50 45a 51, 52 71 72 73 74 94 95 98 Annular groove fork extension longitudinal wall outer wall first transverse wall second transverse Wall protruding part venting chamber loose oil space i 131795.doc -32-